High-Q YBa2Cu3O7-δ microwave ring oscillators

H. K. Zeng, Kaung-Hsiung Wu, Jenh-Yih Juang, T. M. Uen, Y. S. Gou*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


YBa2Cu3O7-δ(YBCO) superconducting ring resonators with YBCO ground plane were fabricated. The resonators exhibit a high quality (Q > 104) at 16 K, indicating high potential for applications. In addition, from the analyses of the surface resistance Rs(T) and reactance XS(T), it was found that the derived London penetration depth λ(T) - λ(5 K) displays a linear behavior over a wide range of temperatures. The results suggest that a distinct line node feature in the gap function of a d-wave pairing superconductor may extend to temperatures higher than previously reported.

Original languageEnglish
Pages (from-to)2079-2080
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberPART II
StatePublished - Jul 2000


  • Microwave
  • Quality factor
  • Ring resonator
  • YBCO

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